93 Instant External Captive Portal https

I am looking for some help. We recently tried to setup an external captive portal on an AP-93 instant the captive portal uses https and if you try to go to http it will redirect you to https.

Having setup the AP it seems to always try to push the user to http rather than https. Is it possible to stop the AP from doing this?

The reason its important is that the AP then captures the https redirect and attempts to push to http again causing an infinat loop of the webserver and the AP trying to battle it out until we get too many redirects error.